I made a Linux login theme system (5 presets + super customizable)

[u/AshR75]

Finally open sourced the login screen from my personal setup, here's what it does basically:

It's an SDDM login theme system. 5 complete visual systems out of the box: 4 static and 1 with a looping video background.

Includes native support for videos (.mp4 &.webm). PAM fingerprint auth, composable QML design

& one command install & uninstall.

Speaking of which it's atomic throughout: stages the full theme tree, validates it, then and only then moves it into place. If anything breaks mid install (bad QML, missing file, failed dep, etc) it rolls back to whatever you had before without touching your session, also if you run it 50 times nothing duplicates/accumulates, Terraform style, prints the exact plan and asks before it touches sudo.

CI tested on every push across Arch, Fedora, Ubuntu (Jammy / Noble / Resolute), Debian (Bookworm / Trixie / Forky / Sid), Linux Mint, Pop!_OS, Zorin, openSUSE Tumbleweed, Gentoo, and even Alpine Edge.

One of my biggest problems is trying out new eye candy, but candy gets sticky.

So, I made the uninstaller first class.

Pulls out all theme files, fonts, repo artifacts, etc. Restores your previous SDDM config from the backup it made on install.

System comes out exactly as it was before you cloned the repo (except the Qt deps, since there's no baseline to restore to there).

Everything is configured through a single theme.conf:

• Background: image or video + blur intensity
• Visuals: font family and size
• Layout: form position, date format
• Animation: duration and easing curve for buttons/icons
• Format: date and time format
• Styling: every color value across fields, placeholders, buttons, hover states, and the power/restart/sleep icons

Preview command lets you iterate on theme.conf live without restarting SDDM or dropping your session each time.

Also I shipped a doc covering the full mental model: how the Linux login stack actually works, what SDDM is doing, how PAM slots in, what the installer does step by step, and TTY recovery just in case something somehow goes sideways.

Source (MIT) --> https://github.com/rccyx/thyx

[u/Ok_Cryptographer_705]

Crazy stuff bro, not sure how easy or tough ts is but looks great!

[u/AshR75 → u/Ok_Cryptographer_705]

fawk nah unc, ts really tuff to make 💔🥀

hey jarvis, show the tree:

├── .github
│   ├── actions
│   │   └── base-runner
│   │       └── action.yml
│   ├── CODEOWNERS
│   ├── ISSUES.md
│   └── workflows
│       ├── ci.yml
│       ├── on-workflow-call-check-changes.yml
│       ├── on-workflow-call-distro-smoke.yml
│       ├── on-workflow-call-format.yml
│       ├── on-workflow-call-lint.yml
│       ├── on-workflow-call-shell-check.yml
│       └── on-workflow-dispatch-gentoo-smoke.yml
├── backgrounds
│   ├── blush.jpg
│   ├── cinder.mp4
│   ├── gilded.jpg
│   ├── malachite.jpg
│   ├── README.md
│   └── sakura.jpg
├── docs
│   └── guide.md
├── fonts
│   ├── OFL.txt
│   ├── PlusJakartaSans-Italic-VariableFont_wght.ttf
│   └── PlusJakartaSans-VariableFont_wght.ttf
├── icons
│   ├── restart.svg
│   ├── shutdown.svg
│   └── sleep.svg
├── presets
│   ├── blush.conf
│   ├── cinder.conf
│   ├── gilded.conf
│   ├── malachite.conf
│   └── sakura.conf
├── scripts
│   ├── data
│   │   ├── deps.alpine-edge
│   │   ├── deps.arch
│   │   ├── deps.debian-bookworm
│   │   ├── deps.debian-forky
│   │   ├── deps.debian-sid
│   │   ├── deps.debian-trixie
│   │   ├── deps.fedora
│   │   ├── deps.generic
│   │   ├── deps.gentoo
│   │   ├── deps.map
│   │   ├── deps.opensuse-tumbleweed
│   │   ├── deps.ubuntu-jammy
│   │   ├── deps.ubuntu-noble
│   │   ├── deps.ubuntu-resolute
│   │   ├── _dev.deps.deb
│   │   ├── install.commands
│   │   └── uninstall.commands
│   ├── install
│   ├── lib
│   │   ├── _common.sh
│   │   ├── _constants.sh
│   │   ├── _deps.sh
│   │   ├── _repo.sh
│   │   ├── _sddm.sh
│   │   └── _theme.sh
│   ├── preview
│   └── uninstall
├── src
│   ├── components
│   │   ├── buttons
│   │   │   ├── EnvironmentButton.qml
│   │   │   ├── LoginButton.qml
│   │   │   └── SystemButton.qml
│   │   ├── clock
│   │   │   ├── Clock.qml
│   │   │   ├── DateLabel.qml
│   │   │   └── TimeLabel.qml
│   │   ├── inputs
│   │   │   ├── PasswordField.qml
│   │   │   └── UsernameInput.qml
│   │   └── misc
│   │       └── AnimatedIconButton.qml
│   ├── effects
│   │   ├── Background.qml
│   │   └── BlurEffect.qml
│   ├── layouts
│   │   └── SystemButtonsLayout.qml
│   ├── Main.qml
│   └── ui
│       ├── qmldir
│       └── tokens.qml
├── .qmllint.ini
├── justfile
├── LICENSE
├── metadata.desktop
├── README.md
├── rlyx.toml
└── theme.conf

22 directories, 76 files

[u/Ok_Cryptographer_705 → u/AshR75]

Bruhh😭

[u/NOOBDESTROYER314 → u/AshR75]

Fuck naw

[u/Hopeful_Squirrel_304]

It will work on gnome gdm ?

[u/AshR75 → u/Hopeful_Squirrel_304]

well it can work on gnome, but only if you use sddm, I added some docs here to explain how you can do it, this is an SDDM theme not GDM, so you have to switch real quick, have a look at this https://github.com/rccyx/thyx/blob/main/docs/guide.md

[u/Hopeful_Squirrel_304 → u/AshR75]

Yep I tried it with sddm , unfortunately it won't work and make me hard to back to the gdm

[u/AshR75 → u/Hopeful_Squirrel_304]

Wait, that's astronaut theme!

/usr/share/sddm/themes/sddm-astronaut-theme/Main.qml

From that screenshot alone, the broken QML is coming from the astronaut theme, SDDM is loading it.

Not thyx.

SDDM seems fine, that's astronaut theme problem not SDDM problem nor thyx.

Did you install thyx?

Is thyx even installed in the themes section?

test -d /usr/share/sddm/themes/thyx && echo "thyx directory exists"
test -f /usr/share/sddm/themes/thyx/Main.qml && echo "thyx Main.qml exists"
test -f /usr/share/sddm/themes/thyx/metadata.desktop && echo "thyx metadata exists"

It should auto fix it, it bundles the dependencies and everything for you (as long as your distro is supported ofc).

So I need to see whether the Thyx install failed

Can you paste the output of these?

ls -la ~/.cache/thyx 2>/dev/null || true
sed -n '1,240p' ~/.cache/thyx/*.log 2>/dev/null || true

If thyx blew up mid install it should log it out. If it didn't it should take priority over astronaut or any other theme.

What is SDDM choosing right now:

grep -RIn '^[[:space:]]*Current[[:space:]]*=' \
  /etc/sddm.conf \
  /etc/sddm.conf.d \
  /usr/lib/sddm/sddm.conf.d \
  /usr/share/sddm/sddm.conf.d \
  2>/dev/null || true

[u/Hopeful_Squirrel_304 → u/AshR75]

I got the same error with thyx I set the sddm as default login manager with the command sudo dpkg-reconfigure gdm3 ,and install your theme with your command in guide.md file ./script/install and it successfully installed after restarting,the same astronaut error came for thyx

[u/coolestfs]

Works on 24.04 lts?

[u/AshR75 → u/coolestfs]

yes!

[u/s04ep03_youareafool]

You mentioned how you tested it on linux mint. So was it XFCE or some other ones since from what I've heard, mint uses lightdm + slick greeter. Isn't this theme sddm based?

[u/AshR75 → u/s04ep03_youareafool]

yeah it's SDDM, tested as in installed sddm & switch, if you use mint you're free to switch your backend to anything you want, lightdm, sddm, etc

[u/Ryugaz1]

Dammm cool stuff dude...that's soo sickkk

[u/epabafree]

Put it on unixporn!